Relay



F. M. SLOUGH.

RELAY. APPLICATION FILED DEC. 7, i916.

Patented Apr. 25, 1922.

2 SHEETSS HEET 1.

F. M. SLOUGH.

RELAY.

APPLICATION FILED DEC. 7, 1916.

,2 SHEETS-SHEET 2.

LINE

Patented Apr. 2", 1922.

I lllifllllllllmllllllll I I Illillilflllllllllllllllllll Illllllllllllllllllllllllllllllll CALLING CllL/NG LINE 1N6 WElP/IVG T0 OPERATORS 5 UNITED STATES PATENT OFFICE.

FRANK M. SLOUGH, OF ROCHESTER, NEW YORK, ASSIGNOR TO STROMBERG-CARLSON TELEPHONE MANUFACTURING COMPANY, OF ROCHESTER, NEW YORK, A 603120- RATION OF NEW YORK.

' RELAY.

Application filed December 7, 1916; 'SeriaLNo 135,636..

To all whom it may concern:

Be it known that I, FRANK M. Snouerr, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Relays, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

. My invention relates generally to 1mprovements in electro-magnetic relays. I aim more particularly to produce a relay of this class especially suited for telephone switchboards and the like, where the space for the employment of relays is limited, and where small currents only are available for operating them.

' In telephone circuits of the latest type more relays are employed than in the older circuits, and. as the switch-board cabinets Were designed for the relays of the older cir- I mounting and housingof additional relays.

. By my invention I produce a relaywhich successfully performs the functions of a plurality of relays, occupying the space of a single relay and responding to the current of the strength available in telephonesys.

with both armatures operated.

Fig. 4: is a front end view of: the embodiment shown in Fig. with both armatures unoperated.

Fi 5 is a similarview showing one ar mature only operated. y I t Fig. 6 is an end view showingboth arma turesoperated. v i jj Fig. 1 is a-front end viewof a second embodiment of my invention withthe armaturesremoved.

Fig. 2 is a side elevation (partly broken away) of the relay shown inFig. 1 with the armatures mounted in position.

the supporting frame.

Fig.3 is a longitudinal section (partly broken away) of the embodiment shown in Fi s. 1 and 2 I ig. 7 is a diagram of a circuit illustratmg a use of the relay of my invention.

Referring now to the drawings and to the embodiments of my invention shown therein, and first to the embodiment shown on the first sheet, the electromagnet ofthe relay is shown at 10, comprising core 11 and a magnet winding 12. The magnet is provided with heads 13 at the ends of the wind- I ing. The return pole piece is shown at P and in the embodiment illustrated, is mount ed on top of the winding. The pole piece 'P preferably consists of a flat piece of iron turned down to form an arm 14 on the back end where the relay may be attached by some suitable means,such asa'screw 15 to Suitable terminals are provided for the winding, one of which is shown atlfi. cuits, there is no space for the convenient Relay contacts are shown at 17, 18 and 19. These contacts, are mounted upon contact springs 17 18' and 19. Any suitable number of sets of springs may be employed and any .suitable combination of contacts and springs employed in a set. I have illustrated three sets, 00, y and a, each .set consisting of a pair of springs in which the contacts are normally made and a pair which are normally open. The normally made contacts are adapted to be opened and the normally open contacts closed: when the controlling armature is operated.

In the embodimentillustrated, the springs are connected to the relay by screws, shown at 20. The springs are separated from each other insulatlng material, such as shown at 21.. I prefer to connect the back ends of vthe springs and the back end'of the pole piece together,the terminal ends of the springs projecting to the rear of the relay. The relay is provided with a plurality of arinatures, eachcontrolling one or more of the switches consisting of the relay contacts. In the embodiment shown, each armature is madeangular in shape and comprises two limbs, one extending across the face of the relay and the other along thepole piece .P. The armature a is provided with a limb 23 extending down the front of the relay and a limb 24: extending along the, pole, piece and adapted to operate the switches controlled by this armature. In the embodiment shown,insulating studs 25"are'provided for the limb 2a which engage one end or one or more of the contact springs. The limb 23 of the armature a is provided with an opening 27, for a purpose to be described and with a second opening 28 through which projects the end 29 of the core 117 In the embodiment shown this end consists of a cylindrical lug projecting from the flat face 30 of the pole piece. The opening 28 is made larger than the lug 29 to provide tree movement of the armature a as it swings back and forth in operation.

A second armature is shown at a provided with a limb 10 extending down in front of the relay magnet. In the embodiment shown this armature is in front of the end of the lug 29 and provided with a stop i1 adapted to engage the lug 29 when the armature is attracted, as shown in Fig. 3. The armature a fits in the opening 27 and is connected to the relay frame, pref erably to the pole piece, by any suitable means, such as a screw 50. The armature a is provided with a second arm it which extends along the top of the pole piece and provided with a lug 45 engaging the end 46 of one of the contact springs. The annature a is connected to the relay "frame by any suitable means, such as by trunnions 60.

It will be seen that when the parts are in normal position the armature a will partake of the polarity of the pole piece P and will monopolize the lines of "force passing from the pole piece to the magnet core, thus shielding the armature When current is connected to the magnet winding, this condition will continue until the armature a has been fully attracted and drawn to the position shown in Fig. 2". \Vhen in this position, the armature a will partake of the magnetic polarity of the magnet core and will no longer shield the armature (4 which still partakes of the magnetic polarity of the return pole piece P, and will be attracted and drawn to the position shown in Fig. 3. It will thus be seen that by my arrangement I provide a relay in which I insure the operation of two or more switches at predetermined intervals of time, and that the construction is such that it will be impossible to operate the armatures otherwise, unless an unreasonable strength of current is placed upon the magnot, which, of course, is not contemplated in the operation of a telephone system.

The employment of the lug 29 improves the operation of the relay in that it is pos sible to so proportion the parts that the small flux which would pass through the armature a and this lug would be insufficient to cause any action of the armature 0 but when the parts are in the position shown in Fig. 2 the lug will render more active the action upon the armature a,.

In the embodiment shown in Fig. 1 to Fig. 3 the head is shown at It provided with a flange tip 8, around the end of the core C The pole piece P is cut away, as shown at 0: for the reception of an extension .e, or the head 71 The armatures are shown at 100 and 101, the armature 101 being pivoted directly to the extension (2,. The lag is shown at 291.

In Fig. 7 I have shown a diagram illustrating a use o1 my invention. The relay of my invention is shown at Qv and the ring ing relay-at It in a cord circuit employed in a telephone system. It is desired to make the circuit of the relay It and after the expiration of an interval of time, to break the circuit in this particular use. During the interval a locking circuit is made for the relay For example, when the calling plug P inserted into the jack J a circuit was made for the relay Q from ground at 300 through the battery 30lrelay Q.- througl'i the relay 302 to grouiul at 302 Belay Q attracts its armature a, closing the switch q and completing a circuit for the relay R, which includes ground. 300- battery 301-- R- and the switches 1 and 7'.

As soon as the relay R is energized. it attracts its armature 310 and closes the switch r, thereby lockingv itself up. A little laterthe relay Q attracts its armature (I, and opens the switch 9. It will thus be seen that the relay Q actuates one armature and a little later, the other armature, and that between such operations there will be time enough for the relay R to close its locking circuit.

I have illustrated and described this particular use and these particular embodiments of my invention for the purpose of explainiug the invention, not that I wish to be limited either to this use or to those embodiments or the details thereof, it being apparent to those skilled in the art that numerous and extensive departures may be made from the embodiments and their details without departing from the spirit of the invention, and that the devices of my invention are capable of numerous other uses than those illustrated and explained.

I claim 1. In a. telephone switch, the combination of a magnet provided with a core and a pole piece, a plurality of switches on said pole piece, an armature for controlling one of said switches provided with a central slot, said armature having an inwardly turned arm, a second armature having an outwardly turned arm mounted in said slot and controlling another of said switches, the first mentioned armature being positioned between the second armature and the end of the mag net core.

2. In a relay, the combination of a magnet provided with a core and a return pole piece, switch contacts for said relay, an armature for controlling said contacts provided with a limb having a portion in front of the end of the core, a second armature controlling said contacts provided with a slot in which the firstarmature is mounted and with a limb normally positioned between the end of the core and the first named armature.

3. In a relay, the combination of a magnet provided with a core and a pole piece, a switch contact controlling armature having an outwardly extending limb, a portion of which is in front of the end of the magnet core and a second switch contact cont-rolling armature provided with a slot in which the first armature is mounted and an inwardly extending limb having a portion normally positioned between the first armature and the end of the magnet core.

4. In a relay, the combination of a magnet having a core provided with an extension on one end thereof, switch contacts for the relay, a pair of switch contacts controlling armatures, one of which is provided with an outwardly extending limb adapted to be attracted to the magnet core, the other armature provided with a slot in which the first armature is mounted and with a limb adapted to be attracted to the magnet normally positioned between the first armature and the end of the magnet core and provided with an opening for said core extenslon.

5. In a relay, the combination of a magnet including a magnet head and a return pole piece, switch contacts, a pair of super posed switch contact controlling angle armatures, said armatures having limbs extending in planes at substantially right angles to each other, one supported from said head and the other from the pole piece, one of said armatures normally shielding the other from the magnetic flux of the magnet.

6. In a relay, the combination of a magnet provided with-a magnet head and a pole piece, switch contacts, a pair of switch contact controlling armatures, one of which is supported from the magnet head and the other from the pole piece, one of said armatures being provided with a recess in which the other is mounted and one of said arm'atures normally shielding the other from the magnetic flux.

7. In a relay, the combination of a magnet having a'core provided with an extension on one end thereof, said magnet being provided with a magnet head and a return pole piece, switch contacts for the relay, a pair of switch contact controlling armatures, one of which ismounted on the magnet head and the other on the polepiece, one of said armatures being provided with an outwardly extending limb adapted to be attracted to the magnet core and the other armature provided with a slot in which the first armature is mounted and with the limb adapted to be attracted to the magnet andnormally positioned between the first arma- ,ture and the end of the magnet core and provided with an opening for said core extenslon.

In witness whereof, I have hereunto V signed my name this 4th day of December, 1916.

FRANK M. SLOUGH. 

